@jafreeman the only DACs you might run into a problem with are the ones that _only_ accept USB inputs and have no other inputs, as you are almost guaranteed not to find a USB output on a traditional CD player/transport.
But otherwise, servers and streamers are using the same I/O connection types as traditional CD players/transports. Most likely you just need to confirm there is a coaxial S/PDIF and/or optical TOSLink input on the back of any DAC you are considering, to match whatever is on your CD player.
But otherwise, servers and streamers are using the same I/O connection types as traditional CD players/transports. Most likely you just need to confirm there is a coaxial S/PDIF and/or optical TOSLink input on the back of any DAC you are considering, to match whatever is on your CD player.